Answer :
The Toolbox allows you to quickly access and add any objects or components to your form.
What is form1.cs?
Form1.cs is a file type used in Microsoft Visual Studio. It contains the source code of a Windows Forms application, which is a type of application that is designed to run on the Windows operating system. This type of application is used to create graphical user interfaces (GUIs) and may include elements such as menus, dialog boxes, and buttons. The Form1.cs file contains the code used to create the form, including working with events and creating the visual elements of the application. The code contained in this file can be written in a variety of languages, including C# and Visual Basic.
By changing the name of the form1.cs file to toolbox, it will give you a better indication of what the file is used for, making it easier to find it when needed.
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